Multiplayer glitch. Resetting profile?

So I've been playing ACR Multiplayer for 4 months or so now. I haven't had any major problems. Yesterday i am playing and I get disconnected from XBOX Live and thrown back to the main menu. I then head back into multiplayer and the introduction video plays and the instructor starts going on about the intro session etc. As if I am starting multiplayer fresh! However my prestige and stats are still unchanged as are my challenges etc. All my ability sets are gone, character customisation is reset and I've lost the Renegade (I've completed the story). So I replay that mission and get the renegade back. I also set my ability sets back up and recraft them (that had been reset too). So today i start playing again, I had a pretty epic session (8 hours or so) and I finish my last game. I get d/c'ed from live and lo and behold it happens again. Everything reset.

So no problems for 4 months and then this happens 2 days running. Anyone know what is going on?